The DOI matches its Crossref record.
Non-invasive estimation of pulmonary artery systolic pressure with Doppler ultrasound.
Open accessAbstract
Systolic pressure in the pulmonary artery was estimated from the interval between pulmonary valve closure and tricuspid valve opening, and the heart rate using a nomogram previously described. The timing of valve movements was recorded by Doppler ultrasound. The estimated pressure correlated well with that obtained at catheterisation in 45 of 48 patients with pulmonary hypertension. Instantaneous variations in pressure and changes with treatment and during exercise could be measured. The method was easy to apply in all age groups, and was found useful both in detecting pulmonary hypertension and in the follow-up of patients. It may help to determine the optimal time for surgery or the effect of treatment.
Overview
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Integrity signals
Registry
Cites
Statistics
Verification
Claims the paper makes
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
Citations
Cited by
Yock, P. G., & Popp, R. L. (1984) · Circulation · doi:10.1161/01.cir.70.4.657 · Cited by 1,640
Janda, S., Shahidi, N., Gin, K., & Swiston, J. (2011) · Heart · doi:10.1136/hrt.2010.212084 · Cited by 375
Bossone, E., Rubenfire, M., Bach, D. S., Ricciardi, M., & Armstrong, W. F. (1999) · Journal of the American College of Cardiology · doi:10.1016/s0735-1097(99)00055-8 · Cited by 277
Doppler Echocardiography: Theory, Instrumentation, Technique, and Application
NISHIMURA, R. A., MILLER, F. A., CALLAHAN, M. J., BENASSI, R. C., SEWARD, J. B., & TAJIK, A. J. (1985) · Mayo Clinic Proceedings · doi:10.1016/s0025-6196(12)60540-0 · Cited by 263
Metadata
- Authors
- Hatle, L., Angelsen, B. A., & Tromsdal, A.
- Venue
- Heart
- Publisher
- BMJ
- Published
- 1981-02-01
- Volume
- 45
- Issue
- 2
- Pages
- 157-165
- ISSN
- 1355-6037 (ISSN-L)
- OpenAlex
- W1974873677
- Cited by
- 215
- References
- 0
- FWCI
- 5.70
- Type
- journal article
- Language
- en
- Open access
- bronze
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review
How to cite
Cite CoChat for the checks on this page, and the paper for its own findings.
- This page
- CoChat. (2026). Citation check: Non-invasive estimation of pulmonary artery systolic pressure with Doppler ultrasound. https://app.cochat.ai/papers/10.1136/hrt.45.2.157
- The paper
- Hatle, L., Angelsen, B. A., & Tromsdal, A. (1981). Non-invasive estimation of pulmonary artery systolic pressure with Doppler ultrasound. Heart. https://doi.org/10.1136/hrt.45.2.157
Data sources
Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
